Characterization the microstructure and defects of matrix graphite irradiated with Xe ions

doi:10.1016/j.nimb.2017.03.159

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	Characterization the microstructure and defects of matrix graphite irradiated with Xe ions
	Xu, HX; Lin, J; Li, JJ; Zhu, ZY; Zeng, GL; Liu, JD; Gu, BC; Liu, B
	2017
发表期刊	NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
ISSN	0168-583X
卷号	406 期号:-页码:638-642
文章类型	期刊论文
摘要	The matrix graphite of pebble fuel elements was irradiated with 1 MeV Xe ions at room temperature to fluences of 5.8 x 10(14) ions/cm(2) and 2.9 x 10(15) ions/cm(2), respectively. The microstructure and defects of matrix graphite samples were characterized by using scanning electron microscopy (SEM), Raman spectroscopy and slow positron beam techniques. The SEM result reveals that hundred-nanometer sized pores appear at the surface after irradiation and the density of pore increases with fluence. Raman results show that D peak (1350 cm(-1)) and G peak (1580 cm(-1)) are broadened after irradiation. In addition, the G peak position shifts from 1580 cm(-1) to 1560 cm(-1) with the linewidth increases from 21 cm(-1) to 132 cm(-1), corresponding to the increase in bond-angle disorder as the matrix graphite transforms from microcrystalline to amorphous carbon(a-C). The slow positron beam study shows that the defects trapped positron S parameter increases with fluence, suggesting that the vacancy-type defects concentration or size of open volume defects increases. The analysis of Raman and slow positron beam consistently conclude that the reason for the phase transition after irradiation is the increase in irradiation-induced vacancy defects accompanied by the overlap of disordered regions. (C) 2017 Elsevier B.V. All rights reserved.
关键词	Neutron-irradiation Carbon Beam
DOI	10.1016/j.nimb.2017.03.159
关键词[WOS]	NEUTRON-IRRADIATION ; CARBON ; BEAM
收录类别	SCI
语种	英语
WOS记录号	WOS:000407659500045
引用统计
文献类型	期刊论文
条目标识符	http://ir.sinap.ac.cn/handle/331007/28575
专题	中科院上海应用物理研究所2011-2018年
推荐引用方式 GB/T 7714	Xu, HX,Lin, J,Li, JJ,et al. Characterization the microstructure and defects of matrix graphite irradiated with Xe ions[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS,2017,406(-):638-642.
APA	Xu, HX.,Lin, J.,Li, JJ.,Zhu, ZY.,Zeng, GL.,...&Liu, B.(2017).Characterization the microstructure and defects of matrix graphite irradiated with Xe ions.NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS,406(-),638-642.
MLA	Xu, HX,et al."Characterization the microstructure and defects of matrix graphite irradiated with Xe ions".NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS 406.-(2017):638-642.

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